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1 - y e a r s t u d y o f n o n s u b m e r g e d i m p l a n t s Table 1 Preoperative parameters Sex Location Tooth type Endodontic treated adjacent teeth Intra-operative parameters Implant placement Diameter (mm) Implant length (mm) Postoperative parameters Gingival biotype Total Male Female Maxilla Mandible Anterior Posterior No Yes Immediate Early Delayed 3.80 4.25 5.00 10.0 11.5 Thin Thick n 28 34 48 14 14 48 27 35 15 18 29 23 31 8 40 22 37 25 62 MBL (mm) - 0.47 ± 0.39 - 0.45 ± 0.41 - 0.40 ± 0.34 - 0.60 ± 0.47 - 0.28 ± 0.42 - 0.54 ± 0.49 - 0.44 ± 0.47 - 0.46 ± 0.43 - 0.34 ± 0.46 - 0.25 ± 0.22 - 0.59 ± 0.46 - 0.63 ± 0.44 - 0.44 ± 0.46 - 0.15 ± 0.47 - 0.51 ± 0.44 - 0.41 ± 0.42 - 0.60 ± 0.46 - 0.26 ± 0.41 - 0.37 ± 0.41 Table 1 Distribution, number of implants placed (n) and MBL (mean ± SD) at 12 months. Table 2 Linear regression results for implant placement using GEE with the robust covariance estimator to account for correlation in the data. The implant was used as the unit of analysis (MBL values expressed as mean ± SD). Table 3 Linear regression results for gingival biotype using GEE with the robust covariance estimator to account for correlation in the data. The implant was used as the unit of analysis (MBL values expressed as mean ± SD). Table 4a Multiple linear regression relating MBL at 12 months to all variables considered. Table 2 Table 3 Table 4a † One patient dropped out 1 month after implant insertion (2 delayed implants). Total dropout was 1.85%. T1 T3 T6 T12 Immediate - 0.06 ± 0.13Aa - 0.19 ± 0.30Ab - 0.25 ± 0.22Ab - 0.34 ± 0.04Ab Early + 0.01 ± 0.26Aa - 0.14 ± 0.44Ab - 0.16 ± 0.38Ab - 0.25 ± 0.45Ab Delayed - 0.05 ± 0.26Aa - 0.26 ± 0.34Ab - 0.44 ± 0.30Bc - 0.61 ± 0.38Bd Equal superscript capital letters represent no statistically significant difference between groups (P > 0.05). Equal superscript small letters represent no statistically significant time-related difference with times in both groups (P > 0.05). T1 T3 T6 T12 Thin - 0.09 ± 0.28Aa - 0.26 ± 0.32Ab - 0.40 ± 0.40Ab - 0.62 ± 0.37Ac Thick + 0.03 ± 0.32Aa - 0.12 ± 0.53Bb - 0.19 ± 0.44Bb - 0.26 ± 0.41Bb Equal superscript capital letters represent no statistically significant difference between groups (P > 0.05). Equal superscript small letters represent no statistically significant time-related difference with times in both groups (P > 0.05). Groups Coe(cid:2)icient Robust SE 95% CI P value Preoperative parameters Sex Location Tooth type Endodontic adjacent teeth Implant placement group Intra- operative parameters Implant diameter Implant length Postoperative parameters Gingival biotype - 0.080 - 0.024 0.160 0.029 - 0.039 - 0.146 0.031 - 0.183 0.625 0.887 0.091 0.070 0.049 0.071 0.068 0.056 (- 0.203; - 0.041) (- 0.198; 0.150) (- 0.019; - 0.339) (- 0.108; 0.167) (- 0.136; 0.058) (- 0.286; - 0.007) (- 0.102; 0.165) (- 0.295; - 0.071) 0.196 0.787 0.080 0.674 0.432 0.040* 0.643 0.001* Journal of Oral Science & Rehabilitation Volume 3 | Issue 4/2017 37